[RE-wrenches] Tile Roof mount compliance
Hi William, We deal with this all day in California. You should go in the attic, figure out the truss type (howe, scissor...), get the spans and sizes of the wood, and pictures of the grade stamps. You can then send this off to a structural engineer to get a letter and a digitally stamped set of your plan set. The Engineer may request structural additions, or different spacing for the penetrations, but most truss is pretty sturdy and capable of supporting the solar panels. If you throw a rock on linkedin, you will hit a Structural Engineer. If you need some help, send me a note off list. Nick Vida___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
[RE-wrenches] We lost a wrench- Will Korthof
Hi Wrenches, Some of you knew Will Korthof from the list, the greater solar community, or the EV world. Unfortunately we lost him last weekend. He was great. Such a great Solar Engineer. Such a passionate green being. So bright. EV driver for a decade, vegan, neat guy. I spent the first 3-1/2 years of my solar career working with him, and I learned a lot. Sorry to bring this to your attention, but I thought some of you might like to know.I have funeral details if you would like them. It is on Monday in Los Angeles. Sorry to be off topic, but most of what I know about solar came from Will, and I believe many of you have had great conversations on here with him. Remembering William Korthof | Plug In America Remembering William Korthof | Plug In America William Korthof, 1978-2014 With inexpressible sadness and a deep sense of loss, we recognize the passing of William Korthof. View on www.pluginamerica.org Preview by Yahoo Regards, Nick Vida nickv...@gmail.com___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
[RE-wrenches] Suggestions for off grid cellular modem
Hello wrenches, I am looking for a recommendation for a cellular modem for a monitoring system. Ideally it would be 24vdc, and outdoor rated or robust enough to survive in a junction box. Cellular coverage is good at the site, but there are no phone lines or data. Do any of you have any experience with this? Application is SMA tripower monitoring. Thanks in advance. Nick Vida ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
[RE-wrenches] walkways installed on solar racking
Hello Wrenches, I was wondering if any of you have had any experience with installing working platforms or catwalks over solar rails. The application would be a standing seam roof not suitable to walk on. We are trying to find a way to install a mechanical system while also providing a walking surface. Any ideas or notable products? Thanks so much. Nick Vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Barcode scanners
If you are looking for a cheapo one that will work for input fields over usb, you can get them at any office store. If you are looking for a pda solution for in the field, i would check out some of these type products: http://www.techforless.com/cgi-bin/tech4less/process?mv_session_id=NqRsHbGy&mv_doit=return&mv_nextpage=split_search&new_search=1&q_phrase=scanner&searchbutton.x=0&searchbutton.y=0&searchbutton=Go But my money in on a total jedi solution being looking into accessories for the pda you might already have depending on what model of sol-metrics you use. Regards, Nick Vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] sanyo ba3 pro solar clamp source
Hi wrenches, do any of you have pro solar clamps for Sanyo hip-200ba3? I am in need of 80 mids and 30 ends. (I cant remember if there is only one clamp you use in both applications?) This was that Sanyo module with the cuff on the edge by the way. Please contact me off list of you want to free up some warehouse space or have a source for purchasing. Thanks, Nick Vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] EMT in attic
Hi Wrenches, Thanks for you comments. Fun for the day is hearing they want to apply section 230 about service conductors and say that flex is not a metallic raceway because it is no good for bonding. They are defining the pv source circuits as a service. I am getting a distinct Wiles vibe here. I find it so annoying when they try to put out these distinctions with no code, no city ordinance and not even an internal memo, especially when they remain obstinate without going to the trouble to actually legitimize the interpretation. Dan- are the output circuits necessarily DC? I would have to look at NEC for a minute, but it doesn't seem to add up to me right now. Thanks, Nick Vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] EMT in attic
Hello wrenches, wondering if any of you are running into inspectors wanting EMT in the attics, or allowing flex only if there is a fusible disconnect on the roof. We have heard this a few time lately and havent yet seen a code reference, (except 690.31e saying metal raceways are fine- not specifying EMT only). I am wondering if this is a new wave of inspectors wanting the future now as informed by an expert seminar, or if there is something I am not aware of. Any comments are very appreciated. Thank you, Nick Vida wrench___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Utility disconnect
My main jurisdiction (Los Angeles City) has a utility with its own service manual with their own requirements. Through experience we know what they require, and it often has nothing to do with NEC. If you bring up NEC to them, they usually laugh at you. Nick Vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] 120% rule applying to conductors
What size is the conduit? Can you re-pull conductors at a higher ampacity? Nick Vida Mac: Nope. William Miller PS: It's pretty straight forwards, the code says "bus or conductor." wm PPS: Can you customer live with a smaller feeder breaker, say 125 amps? If so, your gold. wm At 06:43 PM 9/27/2012, you wrote: >Hello wrenches, >>I am looking for advice on how the 120% rule applies to >feeders for a >subpanel. I have this scenario: >150A bus rating on subpanel >with main breaker of 100A. The conductors >feeding this subpanel are 100A >rated conductors. Can I backfeed with a >40A breaker? >>Thanks___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] GE PV-055-GCA
Hello wrenches, I am hoping some of you might have some experience with the GE flat tile bipv modules from around 2006. We are dealing with a ground fault issue and would like to figure out what to expect. Thanks in advance for your comments. Nick Vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] NABCEP
I like NABCEP because I meet people all the time who couldn't pass the exam. As long as it stays very challenging and requires a lot of specific knowledge I am ok with it. I found it super difficult and would not have been surprised if I failed. I am glad to have a credential that shows I have a high level of understanding of the trade, and I really enjoy the 'NABCEP nod' when I meet others who were able to pass as well. REgards, Nick Vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Washington made
Many of the American sold REC group modules contain silicon made in Washington state.___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Transformerless inverters
LADWP is requiring inverters to apply for articles of certification though their engineers. Several transformerless inverters are approved, others have not supplied the required schematics. I wouldnt worry about the over the counter for LADBS. The plan check is not routine enough for these systems to be over the counter yet. Once they become routine, and the engineers understand the code enough, they will develop a check list, and by and by train the inspectors enough to switch to express permits. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] dial-down breakers and buss rating
I tried this approach once and got totally shot down. The explanation was just like the one you are worried about, too easy to undo.___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] solar accumulation panel
thanks for the link Dave, very useful. Nick Vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] solar accumulation panel
Hello, I was wondering if any of you wise wrenches know if 'solar accumulation panel' is still the name proposed to be used in the NEC. I think I remember Bill Brooks mentioning that they couldn't get it in for 2011, but that it will probably be good for 2014. I was wondering because here in Los Angeles they are revising the standard plan and they have an unusual name for the device, so as it is still a draft, I would us like to align with the future, if at all possible. Thanks wrenches! Nick Vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] non-vertigo safety sun-glasses
Hi wrenches, I am having the hardest time finding rated safety glasses that don't cause vertigo when you get tired. Most of them are curved, and I find that it distorts your vision a bit, and hits you like crazy when you start getting on toward exhausted. Anyone have any luck finding a reasonable brand you actually wear that doesn't make you dizzy? Nick Vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] MC4 Box connectors
How are those things as they come apart after being installed for several years? Pretty strong? any quality issues over time? Nick Vida Brighter Days___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] NABCEP Sales
Hi all, out of curiosity, what resources are you using to study for this? If it is like the PV installer test, it is a puzzle and a test, but all and all, not that hard if you super know your stuff. nick vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Paralleling Mutlitple Inverter
I am a little late on this: Mark and Jay, thanks for the code reference for the solar accumulation panel bus rating. It is too bad that adding a little 15 amp receptacle for your monitoring that draws like 7 watts is enough to incite a derate under the more optimistic school of thought. Also, of course, always tricky when there is ambiguity for for the plan check v. inspector nightmare situations. Nice thread, thanks for the read. nick vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Paralleling Mutlitple Inverter
That is very interesting Jay, do you have a code reference for no derate needed for your solar accumulation panel? Thanks, Nick Vida btw- Rich, thanks for Bernie Sanders.___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] TOU EV charger service equipment question
Hello Wrenches, Hope you are well. I was wondering if any of you have come across any new and interesting ways of dealing with EV Time of Use scenarios. Some utilities will require/ allow a second meter for the EV only, and it seems like more work and more expensive gear than it could be to do a second service/ second meter-main/ or duplex meter. I was wondering if any of you had noticed vendors with more residential appropriate load centers with 2 meter sockets, or what approach in general you are taking in dealing with the requirements. I happen to have one coming up which coincides with a service upgrade anyway, but pricing out a duplex setup is slightly intimidating, and not that compact for layout. Any thoughts or leads would be interesting, and I hope some of the manufactures are addressing this soon to be popular scenario. Best Regards, Nick Vida Brighter Days___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Solar Powered PA system
Sound systems hate square wave and modified square wave, so unless you want to listen to a ground hum and some other mid frequency square waves under your broadcast, only use true sin wave inverters for that. nick vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] SMA Sunny WebBox mobile/wireless options
I have always dealt with that situation by putting a 4 gig SD card in the slot and collecting the data over long periods, then dumping when there is a connection. The internal memory is really small, only enough for short term data, but the card slot takes up to 4 gig cards, and can store years of data. nick vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Feed your Head...Lecture series on Solar Cells
Nice one, OCW is amazing, with a lot of great lectures. It is pretty exciting that MIT, the university largely behind OCW, is releasing MITx this spring. In the program you can get a certificate for completing OCW curricula. One can only hope solar physics is a topic there! http://web.mit.edu/newsoffice/2011/mitx-education-initiative-1219.html ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] sharp 170
Hi wrenches, I am in need of a Sharp 170, either NE-170UC1 or NE170OU1, either new or used. If you have any you are willing to get rid of, please let me know. regards, Nick Vida 818.307.9526 nickvida at gmail.com___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Fronius IG+ and 300.34
Although I am a fan of the IG+, and truly loving not finding space for 2 inverters, I was having a hard time with the AC wiring on my 11.4 today. I realized on the door that "only 4awg..." can be used for the AC wiring, 'unless the conductors are up-sized for voltage drop'. Actually landing those 4awg in there was a chore to say the least. 300.34 occurred to me and I took out the tape measure and found the 4awg to be 5/16", multiplying by 8 gave me 2.5" maximum bending radius. The IG+ wiring section is 2" from the bottom of the terminal to the bottom of the disconnect. Adding the length of the conductor that lands in the terminal makes for some serious dexterous labor, especially all the way in the back of the disconnect. Hopefully in the future the wiring section will become easier in that regard. No folding strands! Nick Vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Low-power consuming LEDs
http://www.digikey.com/ is always a great place to start, especially for small quantity purchases or testing. same with the following: http://www.allelectronics.com/make-a-store/category/340/LEDs/1.html another good place to go is the following event with a free entry for the exhibition: http://www.strategiesinlight.com/index.html you can probably look through the exhibitors to find some contacts. Although it doesn't really apply directly, as the focus is not components, one must always mention LDI if the topic of lighting and LED conferences comes up, although i think you missed it this year. http://ldishow.com/LDI11/public/enter.aspx regards, nick vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Sanyo recall 2005?
Hello Wrenches, Are any of you aware of any recall on low producing Sayo HIP-190BA3 from 2005? Thanks, Nick Vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] UL PV certification?
http://solarprofessional.com/resources/training/details/?TrainerID=1259 Have any of you wrenches noticed the UL certification for PV installer? Anyone take the test? I wonder 2 things, is it a solar puzzle test like NABCEP, and is there a legit experience well above 2 installs for c-10s? It would be pretty great if they prepared you for some finer engineering knowledge of solar equipment, and electonics of the engineered components of the solar components, however it seems like it might be a pretty simple trades knowledge cert from the description. clue me in if you would wrenches. cheers, nick vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] how would you measure a partial short circuit
Thanks Bill and Bob, once again I know more about what I do because of you guys. Bob, thanks for he tip about the ammeter. I havent done too much experimentation with the direction of the clamp, but I think it will be a new standard piece of data I collect before I move any fuses. Hopefully I will be back at that house and be able to figure out what was wrong and let you wrenches know for interest's sake. Have a great 4th nick vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] how would you measure a partial short circuit
Hi Bob, thanks for thinking about my question! I landed the fuses and put the fuses back in (not it- typo) on my sma disconnect, and there was an arc across the fuse holder. Seems like it could have been closing a short circuit on the bus once the parallel connection was made. Hi Bill, Although I am not entirely sure there is no ground fault, I took the conductors off the terminals so they were in free air, and measured pos to neg, pos to ground, neg to ground on both strings, and all I saw was the taper towards 0 from about 20 vdc, and no steady voltage anywhere but pos to negative. That makes me think the voltage is in a short circuit somewhere. I cant yet make any conclusions about the wiring mistake because I had no access to the pull box where the different parts of the strings were connected to each other and to the home run. I do think there might be a short circuit between strings because when the fuse went back in there was an arc on the fuse holder as if there was a short circuit instead of a simple parallel connection. I guess it might have had to do with the 2 different voltages, but there is voltage 'missing' somewhere. Thanks for thinking about my question. Bob, re: inverter capacitors charging, I havent seen that much of an arc with SMA disconnects, and the switch was in the off position, so I dont think there was any signal path to any real electronics. I always pull my fuses and do not replace them until everything is landed and hot and the voltages look proper when I install, and this arc was way out of range of normal. re: backfeeding, I just suspected that too while thinking about your responses, and yes the 2 voltages were different by about 200 volts. Thanks for the thoughts Bob.___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] how would you measure a partial short circuit
Hi wrenches. I had an interesting case today that I have been thinking about since it happened. I dont have all the details because the homeownter had to leave before I was done with the service call, but here is what I do know. SB5000 with 2 strings of 15 modules. String one was 437 vdc, and string 2 was 247vdc. I decided to look for a ground fault, and I turned off the inverter. I measured for ground faults and found no evidence of anything wrong in that regard. As the homeowner was out of time and wanted me to go, I re-landed the wires in the dc disco, and when I replaced the fuses, I noticed a minor arc when one of the fuses was going it. Although I had no time to measure it, I think that there might be a partial short circuit, possibly with one complete string and some panels of the other string, and the remaining panels on the second string. My mind was racing with how I could have measured for a partial short circuit without seeing it as an arch. I can imagine such a thing on a bigger system being a dramatic electrical event. needless to say, I cant wait to get back there and go through the signal path properly and find out what the electrician did. And of course i realized that replacing the fuses in such a questionable situation was probably not the best idea. Do any of you have any thoughts on how one would measure for such a thing? nick vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Fronius IG vs IG Plus inverters
I foresee some more failures in the IG plus, the details of which I will not share here, but you can ask me off-list if you like. I will say that the IG plus has a trifling bracket design with rectangle holes that is not really strong enough to hold the inverter up on its own, and does not lend itself well to a perfect mating of the 2 sections of the inverter. If you think you would like to lag up a stud on the middle row, the bracket will deform, causing you to add more anchors just to hold the thing up in the corners. And if you miss a pilot hole by a 1/4 inch or whatever, and you decide to try and drill out the hole to give you some play, go to your vise, cause the rectangle holes will put your un-sprained wrists in jeopardy. The plus has a way better dc terminal, but you need to get fuses, and the ac terminal is the same horrible white plastic one from the IG. Also, there are removable vent clean outs on the right side of the IG plus, so it is difficult to leave access in some cases, and you might have to remove the power stage to clean them if you run a pipe there. nick vida Brighter Days ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Main panel and ATS request
are there any unusual line side tap considerations when using panels with automatic transfer switches? regards, nick vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Solar Shading App on a Droid
I have it and i dont know how to use it yet. I have been meaning to email them to suggest a youtube chanel to show you how it is done. It describes 3 ways of doing the measurements, but either way you try, it just beeps a couple times and says it is over. You would have to trace your horizon in like 2 seconds apparently. I will admit that I havent tried to much to figure out how to use it, I have only opened it like 4 times, but it is super beta in my eyes, to the point of guesstimating being more attractive if a real tool is not available. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] PV powered music festival
http://www.youtube.com/watch?v=Nb5GpV_LUuU Hey wrenches, super fun to do, especially when you have some context with the folks, Vendor sections are the worst ever because they have no regard for efficiency in most cases. You will want to stock bulbs and devices to lend out. Favorite vendor killer: Christmas lights. Above is my biggest PV rig on a pretty immense sculpture I was on the design team for. If you are cut to the chase, got to :50 seconds. I agree with Welch, you want the spectacle- that is why i did this array at 45 degrees even though it was in Indio, CA nice topic, good to hear wrenches talk about the hectic money looser activities. regards, nick vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] John Wiles
I have definitely learned a lot form reading Wiles, but I have to agree with William Miller. In a sidebar at the session of his I attended, he explained that he teaches the inspectors things that he has tried and failed to get into the NEC. He said that if the inspectors enforce the above the code suggestions he has presented as code, then the general practices might be adopted, and by and by, will become code, and his idea which was rejected by the NEC jury will prevail and he will win. Every time a new wave of inspectors go through his program, the less knowledgeable ones take notes on Wiles' suggestions and somehow absorb his general attitude, and you have to start at ground zero with entitled discussions that cannot be supported by present or imminent NEC. This is not a scholarly. If you want to disagree, you can look back at his "Code corner" in home power and find over and over articles about topics that were never in the code. People with lesser knowledge are misguided by Wiles' lack of integrity as a scholar. I am all for continued output of good knowledge and explanations of better practices to the PV community, but I think Wile's should step aside, and I cant help but wonder if the job is in peril because of his massive seminar fees. nick vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Two Buildings, Two Services, One Roof
It seems like it should be fine if you run one conduit to your shop inverter, and another to a dc disconnect and underground to the house inverter, but I see you running a bonding wire for the 2 GECs as well for some reason. You should go through the part of 250 about different GEC for separate building, which has some optional installation options, and you could likely use that to justify running the equipment ground back to the house. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] balasted racks
hey wrenches. i am looking at some ballasted racks. Any favorites or least favorites? trifling experiences? i would appreciate hearing from you! thanks, nick vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] 690.4B discussion
200.6(D) mentions the separating and labeling of conductors of different systems thumb through that one and you should be able to get a guy on your side. I agree with the zip tie idea as a suitable partition and you see it everywhere.___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] portable freezers
Hi Carl, No I dont have that data, but I might be getting one for an efficient/ compact kitchen design here later this month, and that will be a major curiosity. Inside dimension v. outside dimension looks like they did quite a bit of insulation, and that general design of opening up is good for retaining cold, so I have some pretty decent expectations for that 80 watts going pretty far. So far as the compressor they use, who knows! * Model: FP860 * Operates as a portable freezer or refrigerator * Volume: 86 qt. / equivalent to 120 12oz. cans * Easy to read, easy to use control panel * Range: -8ºF to 50ºF * Voltage power (AC or DC) * 12/24 volt power lead: 6' detachable power cord * 115 volt power lead 8' detachable power cord * Flash Freeze function rapidly cools the unit to -8ºF * Warranty: 90 days labor, 1 year parts * EdgeStar Portable Fridge/Freezer - 86 Qt. * Durable and rugged design * Floor drain * Insulated lid * Rounded edges make it safe around the family * Side-grip comfort handles for easy transport * Compressor based cooling method freezes faster than Thermoelectric counterparts * Approval: ETL * AC power: 80W / 115V / 1A * Weight: 71 pounds * Inside Dimensions: 14.96"h x 15.75"w x 20.7"d * Outside Dimensions: 20.9"h x 28.7"w x 23.63"d ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] portable freezers
Thanks for the insight Dan, hey if you are gonna get one for your camping trip, you might want to look into the Whynter ones, cause they actually claim to be outdoor rated. nick vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] portable freezers
Hi Dan, I am talking about the ice chest looking ones that run on AC or DC electric. There are a bunch of brands with pretty similar design. I have no idea if any of them are any good. Have you used them? EdgeStar? thanks, nick___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] portable freezers
Hi wrenches. hope you are well, Do any of you guys have any experience with portable freezer/ refrigerator units with AC and DC input? I see a couple brands out there, like EdgeStar, Dometic, and Whynter. Anyone have any or ever use any of these? are they good? durable? thanks a million, nick vida___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] NABCEP test
my favorite part of the test was sitting for an ultra detailed exam that expected you to have certain things memorized that no engineer or electrician does't use resources for (like voltage drop, lag bolt ratings, and the rest) and getting the letter with the test location with the wrong address on it! I was sent to: 810 n. Poinsettia Santa Ana 92647 when the actual address was: 810 n. Poinsettia St. Santa Ana 92701 Imagine my surprise when I drove 40 miles to a city I barley know for a test you can't take if you are late, and I arrive in a sub-division! And yes, having a St, Rd or Ln is a big part of finding the place, as well as the correct zipcode! Nick I agree, but what really got me was all the "most safe" questions. I am glad that it is hard, however, because now that a c-10 can take it after 2 installs I think it is pretty hard to really expect too much respect. That being said, combined with my 6 years of installing, it is a nice additional credential. nick vida/ ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] rafter locating tools
that has come up in a number of threads over the years and you can search for your answer here: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/ good luck, and in my opinion it is not worth the cost, i would rather train guys to get it right and how to fix it when they screw up the penetration. nick vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] unisolar and enphase?
Hi wrenches, I have an interesting situation of a intentional living community with a donated old commercial roof section with 4 unisolar pv-144 laminated on top. They want to get the thing grid tied on a budget and I am trying to sort out how. On the one hand, a power one aurora pvi- 2000 makes sense because the additional input wattage can be used on the other chanel if more panels show up, but of course the price is a burden. I was wondering if an enphase would work at all. Do any of you know if the power will attenuate if overloaded for a limited time at solar noon, or will it wreck the inverter. (that would be in a parallel string of 2). I know it is not a great situation array wise, or return on investment, but I would like to sort something out for them. thanks, Nick Vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] TED MONITORING
I would say on TED, which i have a limited exposure to, that they need to do some real work on their documentation because it took me a long time to find their "firmware" update for mac installation, among others, and wow, providing a 3 inch cd rom which is un-usable on most computers instead of your standard 6 inch CD is problematic to say the least. Also, it seems they are getting a lot of tech calls and the guy i deal with hung up on me when I said I was installing on a mac, and took a quite abrupt attitude in the next call for the whole session, which didnt make me feel like it is a very professional solution. It is also problematic in my opinion to have that type of communication on a piece of gear that is likely right by a computer, which will have a power strip full of switching power supplies. so those are minor gripes which i hope they hear about, but what is pretty major, and I havent found any confirmation of this, is that the rumor mill told me that their CTs lost their UL listing. Has anyone else heard that, or am I wrong? ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] two strings of different orientation
sounds like a great situation for tigo power optimizers we should be seeing pretty soon. nick vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Learning about the grid resources
Hi wrenches, I am starting to study the grid and how it works, gear involved, voltages, transformers, maintenance...and whatever else I can learn. I was wondering if any of you have any suggestions for resources for my reading list, or web pages/ magazines you keep current with. thanks, nick vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] xantrex xw experiment
Hi wrenches, I am looking at the xantrexXW system with 2 inverters, and I asked their tech support if it is possible to have 2 inverters synced to the same grid and backup power, but without being parraled on the battery bank. My hope was that the 2 inverters could switch between master and slave based on state of charge for 2 separate battery banks, with 2 separate charge controllers. The backup would be a generator, and could be 2 differentgennies, one on each system, or perhaps one generator on a 2 inverter grid. I know it is a lot more inverter than what is probably needed, but i would really like to have 2 separate banks to avoid weaker cell issues. do you wrenches have any thoughts on this little dream? and no, xw cannot sync the frequency without being on the same battery bank with one master and one slave in parallel according to what I was told. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] apollo charge controllers
wondering if any wrenches have any opinions on the Apollo charge controllers T80 in particular. I heard they had some technical issues not to long ago- is that resolved? thanks, nick ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Best Choice for PV in hot climates
Peter, I think there was a pertinent article along these lines in the Photon US mag they were handing out in Anaheim at the SEPA conference. regards, nick ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Apollo Solar TSW TrueSineWave Inverter/Chargers
Hi Wrenches, I was wondering if any of you have worked with the Apollo TSW inverter. It looks a lot like a Xantrex DR. I am wondering how good it is. regards, nick vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Fronius IG Plus line
was brooks talking about the plus line? I think not. I think that thread was regarding the Fronius IG the thread was: Efficiency Curves of Fronius Inverters? ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] PV Powered vs SMA
Yes I know the failures you were mentioning in 05-06. I had one that had 2 blown 20a ac midget fuses inside the cover. i was told by the service of their partner company at that time to replace the fuses- it might have been a grid surge that took out the fuses. i did so later that day and the inverter started and counted down. I heard the click, a very short interval of their very annoying operating tone, and then BOOM lika an M80 firecracker was inside the inverter. I was so thankful that I had decided to put the cover back on the unit in the time while I was waiting for the countdown. truly humbling like only electricians can understand. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Equipment shortages, long lead times?
now how do you guys feel about all the "ramping down for second quarter 2009" announcements in the industry rags? as if you weren't frustrated that solar manufactures were participating in recession consolidations already! nick ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] "its a UL listed assembly"
Thanks for a great response Matt, and an interesting lead to a product solution... Let me preface this with saying I am installing another company's design, so all you are saying about proper gear at the service is totally heard, and this tap would not be something I would design... The situation is a Wadsworth tandem 100amp main. Really rare and weird panel from the early 60s. It has 2 service entrance masts, and a 8 jaw meter socket feeding 2 separate fused 100 amp load centers. The design was to tap into one of these with 40amp fused disconnect from a sma 7000. Unfortunately the wires in the Wadsworth gear is type TW which is not included in the Feeder exception of 310.16. When this was discussed. I threw out there the idea of changing the wires. These guys wanted to void the listing for piercing taps and any other taps The REAL problem is the wording of NEC 690.64(B) because all these guys that are not willing to wrap their head around what the signal path/ back feeding/ over-current/ 230 tapping scenarios are... read 120 and wants to apply it to everything in the system. These inspectors were explaining to me that the feeder IS the buss and 120%... and its really hard to explain the intent with the language of the paragraph. It needs to be 2 separately described scenarios in my opinion, to avoid the constant misunderstanding. Also, the NEC says in 690.64 and the 230 reference there, that taps are permitted for solar... not much detail, not much help. It seems like these inspectors consider the "voiding the UL listing" is a dead wall conversation ender. I'm almost willing to admit you are right, it is totally valid, which makes the point of .64 come into question. I hope you are right about newer gear having listed tapping means and large buses for solar. It seems like that will take a while to filter down because so many people work with electricians different than the solar installers they are working with (and because so many installers focus on solar and don't wire houses). I think the glimmer of hope that a tap will pass on a retrofit is gonna keep them around for some time. And I really think that the code needs to address the options better. looks like someone involved here is buying a service upgrade. surprise! ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] "its a UL listed assembly"
wow wrenches, fun solar day for me. Another supply side tap nightmare. Have any of you ran into a situation where the AHJ will not let you upgrade the feeders from the meter to the main breaker because it "voids the UL listing"? In this case I had 1 AWG feeding a 100 amp main, but it was type TW which is not on the feeder exception 310.16. In running into the typical daftness on 690.64 I asked if I could replace the 1 AWG TW with Type THHN so the feeder chart would apply and there would be 150 ampacity wires feeding the 100 amp main. No luck, all frustration. Any wrenches have any thoughts on this? Nick Vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Enphase track record
I That's interesting Drake, about the accessible groups. Are there clearance issues for thermal concerns or anything? It sounds like you could run your dc wires up the rows and have all your inverters grouped on the top rail. That a one man call to trouble shoot a system which has been a big concern from many voices all along. Maybe those guys can offer several whip lengths or something... i don't know I haven't worked with the gear yet. nick vida I'm also concerned about the issues brought up here. I have two possible projects that would benefit from Enphase due to the fact that the modules will go on more than one roof, with significantly different orientations. In one case, there are shading issues as well. Supposedly the Enphase units are selling fast. Someone must be installing them. They have been out long enough that there must be some data as to whether or not the units are surviving. The long term will not be known until the inverters have been out for many years, however if they are having issues in the short term, then we know they have issues. One idea that Enphase tech support said was acceptable was to mount the inverters in accessible groups. The DC leads would need to be extended, and some loss would occur. Also the inverters can be mounted in vented attics. Having the inverters in a group in an accessible attic would make maintenance easier than tearing apart an array to get to a dead inverter. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Enphase track record
I put a temperature probe under the modules almost every job, and it is always drastically lower than the module itself. A frying module at 130 might have an ambient temperature underneath in its shade of 89 degrees. the specifics are always surprisingly low relative to touching the panel and how your face feels up there. Nick Can anyone think of a more brutal environment for a piece of electronic equipment than under a solar module which day in and day out experiences the elements and temperatures of 130+ plus F? Despite any so-called accelerated life-cycle testing and estimated mean time to failure probabilities, nothing takes the place of actual time cooking under solar arrays. Having seen my fair share of controller and inverter manufacturers come and go out of business in 30+ years in the RE field, I'll be watching with great interest the great Enphase experiment unfold. And ever heard of the word "recall"? Swapping a central inverter or two is one thing. Imagine doing it with the X number of microinverters you installed six months or two years ago... But hey, other than my Eeyore-sounding words above, aren't Enphase inverters so cool with all that they can do? marco in Hawaii A while back there was a discussion about the reliability of Enphase inverters. As I understand, they have been selling like hot cakes, so a lot must be installed. Some sort of track record must be emerging. Has the promised reliability of these inverters been met? Can they be connected to a rail, under a large array without worry that the unit will need to be dug out and replaced? Should the inverters be located in an attic or other accessible location. Thanks, Drake Chamberlin Athens Electric OH License 44810 CO License 3773 NABCEP TM Certified PV Installer Office - 740-448-7328 Mobile - 740-856-9648 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.425 / Virus Database: 270.14.52/2485 - Release Date: 11/06/09 19:39:00 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Day4 Modules
they are here at solar power. its cool technology, they have a mesh on the top of the panels instead of traditional solder lines. This reduces resistance so they get better efficiency. They also flash test each panel so you can sort the for mismatch before installing. Yes they are made in Canada, although I don't remember to what level (all the way to foundry? i dont know). They said they are looking for distributors/ dealers so call them. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] REC modules
Drake, REC are pretty good id say. They are big, like Sharp big. A bit of a challenge to layout on a roof. They have a removable back on the junction box and there are 3 diodes i believe. Everything in there looks like its fastened by compression, which might be why they had that recall on the previous model line. The frames are low profile, and I noticed that the corners are crimped together, not screwed together like some of the other panels. I wonder how that will last in the long run, and in certain climates (any wrenches with experience with this type of frame fastening?) One thing I didn't like is the glass shifts around in the frame when you lift the panels over your head, but they are secure and the frame is sturdy. There are no additional cross braces like some of the other panels that size. Voltage and current are similar to many other modules. I am impressed by the proactive recall of their previous model they sold in 2008 because they were willing to take a loss for their good standing and respectable reputation. Not the smallest or most efficient out there, but good for the price if they fit, and you are probably buying their silicon when you buy other panels because REC group is one of the largest producers in the world. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] pull box in solar raceway
With certain designs where you have the service between the array and the inverter, you may be compelled to make a common raceway to a pull box and divert a conduit to the service from there. The conduit between the pull box and the inverter would then have your ac wires and dc wires running to the inverter and branching at the pull box. Would the GFDI still operate properly if you bond your system ground from the inverter with the equipment ground from the array in the pull box, or would that pathway to the grounding system in the service from the roof not allow the inverter to detect a ground fault properly? If there is a difference to the inverter, how would bonding the raceways affect the ground path? (If you are bonded at all fittings roof to the inverter, then the conduit from pull box to grounding system would be a path that could also circumvent the inverter.) ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Rooftop wiring methods between multiple subarrays
Max, I'm with Bill Brooks, among others on this one. You are risking more than you might want to realize by bonding with mini (hanger) straps. Without an excelent path to ground through you equipment ground touching all frames on your array, you are risking static charge that can attract lightning. Also, your negative conductor is bonded to ground in your inverter, and if that is a better path to ground than your mini straps, then the lightning current might want to pursue that path and totally fry your system. You can find an interesting report by arco on a lightning study shared here on the list by mr. joel davidson of los angeles. my choice is to run emt with connectors and ground bushings and run ground wire through the emt. I personally like to put only a connector and a plastic bushing on the other side because that stick is bonded, but that is maybe arguing against an article 250 code reference. I dont worry about running bare copper through the emt unless it is 6 awg or greater, and i would need to grab the NEC, but i think that is the cutoff (however i have never considered galvanic incompatibility before this thread). it is great that you are seeing eye to eye with your AHJ, but i would rethink that one. nick vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] LADWP complaining
http://www.ladwpsolarnews.com/workshops Peter, on your gripe in the orientation thread i thought you might like this link. LADW just finished a series of angry frustration venting sessions where they were "work-shopping" ideas for how to put Los Angeles solar installers out of business with bigger smiles on their faces. :) hope you got your chance to get placated. nick ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] ocean side gear performance/ life cycle
hello wrenches, i was wondering what you sea side, marine, and tropical installers have found to be great modules and materials in ocean adjacent installations. I was wondering about what decreases in life cycles one can expect, how tedlar holds up, RHW/ cable tray issues, what frame issues might arise in storms... and of course about general corrosion. i am also wondering about how typical racking and standoff materials work out and last- for corrosion and storm loads. also, how does emt/ rigid/ seal tight conduit fair? i saw a couple of things in archives about checking that your galv and stainless are of a high grade for hardware, which was interesting. any thoughts friends? thanks, nick vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Rooftop DC disconnects
this is already required in Los Angeles county in a county ordinance. They are looking for dc disconnect directly after any combiner box and no conduit entering a building without disconnect- both commercial and residential. You wont see it in NEC unless you look in the 2002. I dont have the ordinance handy, but the plan check in those offices have the reference. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Vertical wall mounted arrays
maybe build a jig on the roof to hang plumb bobs so you know exactly where the frame is, then after the lathing is done, drill through to the sticks, and lag bolt into the frame while also epoxying into the stone, and use some pretty hefty bolts. Then you can use some short standoffs. If thats not enough for you, maybe run up the wall with stainless steel uni-strut behind the array as part of your fastening strategy. sounds like a fun design! nick ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] losses to competing angles in single strings
hello wrenches. I was wondering if any of you have any data on what the losses would be if you had your string split with 2 different angles, but at the same azimuth. For instance, string of 11 with 8 facing 180 south at 30 degrees, and 3 facing south 180 at 45 degrees. I have heard that the voltages and currents would differ and the IV curve would be inefficient as a string, but I dont know how much of a loss would be expected. thanks in advance, and hopefully I didnt miss anything in the archives. thanks, nick ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Thermal issues with PVC (was RE: raintite box mounting angle)
Hans, that is an interesting reference, well done. what about if the box is under the panels and only experiencing ambient temperatures? That is kind of my current preference when I have to use pvc due to the deforming issues... since the panels are movable by unbolting the slow-release mounting system, it is alright. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] down-sizing main breaker
Dick, I think im in William's camp and you may have gathered from my earlier post in this thread. The actual logic and safety concerned in reality and practice may be totally true and valid from your perspective (and in reality), however the wording of the code allows for you to get a out of the blue expensive correction. it is really to obscure in trying to describe 2 senarios in one sentence and i know form a hell week that i had last week that if you run into ahj not being satisfied, you have some heat on your shoulders. I agree in theory that the feeder would always be unable to really be overloaded with the overcurrent protection there at the main breaker, only the bussing in the sub-panel is a concern. its just that the code is so well worded for daftness. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] down-sizing main breaker
if you read 690.64b it does mention both the buss rating AND conductors. for years and years I thought it was just for the buss rating until i got called recently for the feeders being undersized and unable to accommodate the solar within 120%. I see a lot of sentiments in this thread that it is only for busing, and I would really like to discover a reference to that. Someone told me something about the difference of having main lugs and main breakers in the sub panel... i am looking into it. >From the literal of 690.64 it would seem that if you are fed with #4 than you >are stuck with 120% of 100a regardless of the sub panel rating. nick ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] down-sizing main breaker
if you read 690.64b it does mention both the buss rating AND conductors. for years and years I thought it was just for the buss rating until i got called recently for the feeders being undersized and unable to accommodate the solar within 120%. I see a lot of sentiments in this thread that it is only for busing, and I would really like to discover a reference to that. Someone told me something about the difference of having main lugs and main breakers in the sub panel... i am looking into it. >From the literal of 690.64 it would seem that if you are fed with #4 than you >are stuck with 120% of 100a regardless of the sub panel rating. nick ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Watt-hour meter
you can wire a 4 jaw meter for 120 by lifting that little clip on the back of the meter and using the left side top for line and left bottom for load, but i think you need to do a high resistance neutral attached to the screw that holds the jumper. you might want to look through old grid tied battery backup stuff for this because there are a lot of 120 inverters in that genre, the installers of which, may have had to sort out a performance meter for. you could get 2 auto transformers and use a regular performance meter in a socket to keep things simple but overdone. nick ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] myers hub
here is one i came across drake, look on the second page for "ground hub" or "ground nut": http://www.crouse-hinds.com/catalog/pdfs/00267to00270.pdf i think most companies have this option, its just a matter of getting your supply house to order it from the manufacturer they work with. nick ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] myers hub
guys, on myers hubs... are these even rated for emt connectors? i know that a lot of inspectors look for them, and a lot of electricians use them, but i just went through several manufacturers cut sheets and they only say for rigid and imc. nothing is said about emt or emt fittings. In fact they are tapered to accommodate rigid pipe, which we all know makes it tough to close the gap with emt connectors. It makes me think that one should use a water tight gasketed fitting and a bonding bushing for these situations. I guess the question is if these emt connectors qualify for 250.92(B)(2). i still cant imagine using anything else coming into the top of a metal enclosure... Nick ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] myers hub
hey August, Yes we are saying the same thing, i was talking about a bonding bushing. The reason I said bonding screw is because the myer hub i use in that scenario only has a screw on it not a lug. The point was to mention that you need to bond your conduits together so there is no interruption from the pvc box. Drake, look ask about the other options for myers hubs at your supply house, because you can buy them with a bonding screw on the lock nut side. nick Hi Nick, Don't you need to install a bonding bushing with an equipment jumper to bond all conduits together regardless of whether you're using a Meyers hub or not in a non-metallic enclosure? I might be misunderstanding you, but I don't see how a bonding screw will do any good in a non-metallic enclosure. -August August Goers VP, Engineering Luminalt Energy Corporation O: 415.564.7652 M: 415.559.1525 F: 650.244.9167 www.luminalt.com <http://www.luminalt.com/> august at luminalt.com _ From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Nick Vida Sent: Friday, July 24, 2009 1:54 AM To: wrenches Subject: [RE-wrenches] myers hubs yes you need a myers hub for the same above the bottom 1/3 and into the top for your non-metalic enclousure. some will use a water tight connector (raintight with a gasket ring). Either way you need a bonding bushing on your connector or a myers hub with the bonding screw on the inside locknut to bond together all the conduits coming into the enclosure. i would suggest a hole saw definitely if you are working with fiberglass combiner box and also for a pvc box because a unibit makes a cloud you dont want around you in fiberglass and makes a beveled hole in a pvc box that can make a seal difficult if your not careful. nick ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] myers hubs
yes you need a myers hub for the same above the bottom 1/3 and into the top for your non-metalic enclousure. some will use a water tight connector (raintight with a gasket ring). Either way you need a bonding bushing on your connector or a myers hub with the bonding screw on the inside locknut to bond together all the conduits coming into the enclosure. i would suggest a hole saw definitely if you are working with fiberglass combiner box and also for a pvc box because a unibit makes a cloud you dont want around you in fiberglass and makes a beveled hole in a pvc box that can make a seal difficult if your not careful. nick ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] REC Solar melt-down
wrenches, the defect in REC panels is the frame expands past the panel and can contract and break the glass. Unfortunate, but no big deal in a lot of ways. I dont know if there is another defect, but that one would warrant a recall instead of replacing a lot of panels. There was also an article about their Oregon plant breaking a couple hours after it went online. Im glad to see they have done a recal. I think it is proper and good business. I think thier silicon and wafers are fine and well made, and we would hopefully find out if they werent because they are a major supplier of wafers to several manufactures. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] fronius IG Plus practical engineering WAA???
guys, thanks for your input. I didnt know about the add on. glad to see it is out there. thanks again Nick Vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] fronius IG Plus practical engineering WAA???
hey Wrenches. I opened my soon to be installed fronius IG Plus to see what was going on in there, and found myself a bit disappointed. There is a 6 string combiner in there which is fine, however there is no bypass for the fusing section and the terminals are rated at 20 amps. In a situation where you have 6 strings, you cannont combine on the roof and run down with a pair of conductors, instead you must run down with your strings. This means instead of running 3/4 conduit for 8awg pair and ground, I would have to run 1" conduit for 6 pairs of 10 awg and ground. (thats a lot of flex for a 2x4!!) So if I need a disconect on the roof, I would need 2 disconects, and correct me if im wrong-- but i would need 4 disconects in the future because this is a transformerless inverter. I also noticed that they are still using those mediocre white plastic terminals for the ac connection that so many people found annoying. And fyi, there are no fuses in the fusing section, so dont forget to order them. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] squirrel problems
This is interesting to see what regions the squirrels are active. I hear Vermont, Mass, New Hampshire, and Colorado here in southern California I have heard of no problems any other areas anybody knows of? is it the cold weather? is it only use-2 or is this including rhw? nick ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Santa Monica guidlines/ CEC
Wrenches, This is an interesting email i received today from an inspector in Santa Monica, CA. He reference the CEC, and I am not familiar. Is this the Canadian Electrical Code(CEC)? Also, Santa Monica, CA just published their guidelines and there is a link in the email. They are pretty close to the one Bil Brooks worked on for Schwarzenegger. Here is the Email (my draft of my response follows): Hi Nick It is my understanding that your permit will be extended by 6 months. Here is the short cut for the SM PV standards. Shortcut to: http://www.qcode.us/codes/santamonica/index.php?topic=8-8_40 Weather and sunlight resistant stickers are acceptable. The following correction items are in commonly overlooked. * The PV source and PV output circuits can not be contained in the same raceways per 690.4(B). * A newer and commonly missed requirement is the identification of conductors of different systems. The conductors of the DC are required to be identified differently per 2007 CEC 310.12, 215.12, 210.5(C) and 200.6. The 2007 CEC is based on the 2005 NEC. * Please download the CalOSHA requirements for the installation of ladders. Inspectors will not climb ladders that are not compliant with the requirements. Please be prepared to install a suitable ladder, inspectors may not be permitted adequate time to wait for the installation of various ladders. If I can be of further help please don't hesitate to contact me. Thanks Nick Katsenis Combination Building Inspector 1685 Main Street Santa Monica, CA 90401 310.458.2201 ext.8120 310.458.2104 Fax nicholas.katse...@smgov.net my response draft is: Nick- The following correction items are in commonly overlooked. > * The PV source and PV output circuits can not be contained in the > same raceways per 690.4(B). the rest of the sentence you are referencing is: "as feeder or branch circuits of other systems..." The clarification note in the handbook is: For example, 690.4(B) does not permit the conductors supplying an exterior lighting fixture located in close proximity of a roof- mounted PV array to be installed in the same raceway or cable with the conductors of PV source circuits or PV output circuits. Conductores directly related to a specific PV system, such as those in dc and ac output power circuits, may be contained in the same raceway as PV source and output conductors... (page 1020 2005 NEC Handbook) We would only be running the solar circuits in our raceways connecting different runs to our gear. Are you saying you have a concern about such a raceway? Nick Vida Any thoughts Wrenches? ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] California solar intiatives
On prop 10, yes you may feel whatever way you would like about Pickens. Seeing how much windy land he owns in texas and that he owns clean energy natural gas stations makes it a bit insipid that he is trying to use the government to increase his infrastructure. But as a tradesman, if you dont think natural gas is a important way to run your fleet of heavy vehicles now and in the future, then i dont understand that. You can run CNG right now, in fact I do and have for years. It is effective and lower emissions (isnt that part of what your business is? environmentalism?) I have seen one work van that runs on batteries in europe that has a low range and a long charge time. The reality of our business and all the other tradesman is driving up to 200 miles a day and driving around often. You can do what you are doing now, (buying gas until the battery van comes out never joel?), run a neighborhood business, or use natural gas. And if you do already, then you welcome an increase in the infrastructure and can only hope they will use garbage and cow poop to reach increasing demand instead of imports. And of course, when the sales fleet and customers are all going around in EVs, you are right Joel, this state will have officially pulled its head out of its natural pocket. > Hello Jay, > > CalSEIA (and I) am opposed to Prop 7 because, among other things, it would > exclude renewable projects that are 30MW or less from counting toward the > State's Renewable Portfolio Standard. If Prop 7 becomes law, it will > adversely impact the developing markets for distributed solar technologies > that are located close to load centers and reduce market opportunities for > many solar companies throughout California. Ensuring that <30MW systems > can > be counted toward RPS goals is very important to expanding the use of > solar > in California. The Prop 7 people seem well-intentioned and probably got > their >30 MW language from the distinction between small and large hydro > (large hydro is bad ecology). I am not a "small is beautiful" hardliner > because some big problems require big solutions. I think that the world > needs both small and large scale PV. We need Jay's PV and PG&E's 800 MW PV > too. > > Prop 10 is another story. The Los Angeles Times editorialized against Prop > 10 on September 19, saying, "Spending bond money on something as > intangible > as privately owned vehicles is a terrible idea unless there is a clear > public benefit." The Santa Monica Mirror said, "Self-serving Prop. 10 > sounds > good, should lose." See > http://ballotpedia.org/wiki/index.php/California_Proposition_10_(2008) T. > Boone Pickens will definitely benefit from his Prop 10. I think he is > smart > enough to figure out a market-driven way to sell and fuel more natural gas > vehicles. I also think that one of Prop 10's supporters, the California > Air > Resources Board, failed in their duty to the public when the caved to the > automobile and fossil fuel industries and killed the electric vehicle > mandate. Take fossil fuels out of Prop 10 and I might be in favor of it, > but > I am against burdening the next generation with another $10 billion debt > for > a transitional technology like slightly cleaner vehicles. Let's make the > great leap forward and end our addiction to fossil fuels asap. > > Joel Davidson > > - Original Message - > From: "jay peltz" <[EMAIL PROTECTED]> > To: "RE-wrenches" > Sent: Sunday, October 05, 2008 12:00 PM > Subject: [RE-wrenches] California solar intiatives > > >> Hi All in California. >> >> What seems to be the best way to go on the two intiatives #7 and #10. >> >> Thanks, >> jay >> >> peltz power >> ___ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> > > ___ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > -- [EMAIL PROTECTED] Energy Efficiency Solar Electrical Solutions eesolar.com ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rul
